19-Hydroxy-19-methyl-6a-carba-PGI2 amides

ABSTRACT

The present invention provides novel 19-hydroxy-19-methyl-6a-carba-PGI 1  amides which are useful for pharmacological purposes, e.g., anti-asthmatic indications.

DESCRIPTION CROSS REFERENCE TO RELATED APPLICATION

The present invention is a divisional application of U.S. Ser. No. 054,720, filed July 5, 1979, now U.S. Pat. No. 4,225,507.

BACKGROUND OF THE INVENTION

The present invention provides novel prostacyclin analogs. Particularly, the present invention relates to prostacyclin analogs substituted at the C-19 position by hydroxy.

Particularly, the present invention relates to 19-hydroxy-19-methyl-6a-carba-PGI₂ amides. The novel prostacyclin analogs are useful for pharmacological purposes, e.g., as anti-asthmatic agents. The preparation and use of these compounds is incorporated here by reference from U.S. Pat. No. 4,225,507.

PRIOR ART

For background on prostacyclin, see for example R. A. Johnson, et al., Prostaglandins 12, 915-928 (1976) and R. A. Johnson, et al., J. Am. Chem. Soc. 100, 7690-7704 (1978), and, as to pharmacological activity, the references cited therein. For analogs of prostacyclin, see, for example, J. Fried, et al., Proc. Natl. Acad. Sci. U.S.A. 74, 2199--2203, K. C. Nicolaou, et al., J.C.S. Chem. Comm. 1977, 331-332, N. A. Nelson, J. Am. Chem. Soc. 99, 7362-7363 (1977), and K. Kojima, et al., Tetra. Letters, 1978, (1977), and K. Kojima, et al., Tetra. Letters, 1978, 3743-3746. Regarding the nomenclature for analogs of PGI₂, see R. A. Johnson, et al., Prostaglandins 15, 737-740 (1978).

SUMMARY OF THE INVENTION

The present invention particularly provides a prostacyclin-type compound of the formula ##STR1## wherein L₃ is (1) --(CH₂)_(n) --, wherein n is one to 5, inclusive,

(2) --(CH₂)_(p) --CF₂ --, wherein p is 2, 3, or 4, or

(3) --CH₂ --CH═CH--;

wherein M₂ is ##STR2## wherein Q is oxo, α--H:β--H, α--OH:β--R₄, or α--R₄ --:β--OH,

wherein R₄ is hydrogen or alkyl of one to 4 carbon atoms, inclusive,

wherein R₅ and R₆ are hydrogen, alkyl of one to 4 carbon atoms, inclusive, or fluoro, being the same or different, with the proviso that one of R₅ and R₆ is fluoro only when the other is hydrogen or fluoro;

wherein R₇ and R₈ are hydrogen, alkyl of one to 12 carbon atoms, inclusive, benzyl, or phenyl, being the same or different;

wherein R₉ is hydrogen or hydroxyl; and

wherein X is

(1) trans--CH═CH--,

(2) cis--CH═CH--,

(3) --C.tbd.C--, or

(4) --CH₂ CH₂ --. 

I claim:
 1. A prostacyclin-type compound of the formula ##STR3## wherein L₃ is (1) --(CH₂)_(n) --, wherein n is one to 5, inclusive,(2) --(CH₂)_(p) --CF₂ --, wherein p is 2, 3, or 4, or (3) --CH₂ --CH═CH--;wherein M₂ is ##STR4## wherein Q is oxo, α--H:β-H, α-OH:β--R₄, or α--R₄ :β--OH, wherein R₄ is hydrogen or alkyl of one to 4 carbon atoms, inclusive, wherein R₅ and R₆ are hydrogen, alkyl of one to 4 carbon atoms, inclusive, or fluoro, being the same or different, with the proviso that one of R₅ and R₆ is fluoro only when the other is hydrogen or fluoro; wherein R₇ and R₈ are hydrogen, alkyl of one to 12 carbon atoms, inclusive, benzyl, or phenyl, being the same or different; wherein R₉ is hydrogen or hydroxyl; and wherein X is (1) trans--CH═CH--, (2) cis--CH═CH--, (3) --C.tbd.C--, or (4) --CH₂ CH₂ --. 